Steam boiler



June 22 1926. 1,589,999

P. THOMSEN STEAM BOILER Filed April 28, 1925 WITNESS INVENTOI? PatentedJune 22, 1926.

UNITED STATES PAT PETER THOMSEN, 0F CASSEL, GERMANY, ASSIGNOR T0SCHMIDTSCP IE HEISSDAMPF GESELLSCHAFT M. B. EL, ,0! CASSEL-WILHELMSHOHE,GERMANY.

STEAM BOILER.

Application filed April 28, 1925, Serialll'o. 26,324, and in Germany May2, 1924.

My present invention relates to steam boillevel of the lower containersand preferably and-water containers or airanged laterally of the grate,at the same level therewith; the'grate may be located between the drivewheels of the locomotive.

By providing two upper containers, I am enabled to make them of smallerdiameter and therefore of thinner metal than when a single uppercontainer or drum is employed. The manufacture'of the boiler is thusmade easier and less expensive.

It is important that a thorou h water circulation be insured in thecontainers, the fire box walls, and the water tubes. For this purpose, Iconnect the containers with the water chambers of the fire box in such amanner that water will circulate through all of the containers andthrough the water chambers. For instance, the water chambers on" eachside of the fire box may be connected by pipes in which the waterascends, alternately with the upper containers loeated on the same sideand on the other side respectively, while the only direct con nectionfrom each lower container to the fire box is b pipes leading to therespective water c amber on the same side, the water travellingdownwardly in these latter pipes. a

A satisfactory and preferred example of my present invention isillustrated b the accompanying drawings, in which i 1 is a somewhatdiagrammatic longitudinal vertical section of a locomotive boiler em=bodying my invention; Figs. 2 and 3 are vertical cross sections on lines2-2 and 3-3 res ectivel of Fig. 1.

The boi or shown com rises four steamrums a, a, b, 1), extendinglongitudinally from the fire box to the smoke box. They are representedas horizontal, althou h this is not essential. On each side of t elocomotive there is a lower container or drain a or a and acorresponding upper boiler or drum b or I) respectively, the boilers ordrums, a, B, on one side being connected by water tubes 0, while thecontainers or drums a, b on the other side are connected by water tubes0. The upper drums or containers 6, b are relative- 1y close together,while the lower containers or drums at, a are much farther apart, theirspacing corresponding approximately to the gauge of the track on whichthe locomotive is to travel, as indicated in Fig. 3. The side walls ofthe fire box are formed by water tubes connected with the uppercontainers 1). b and with water chambers d located at each side of thegrate at a level below the lower containers a, a and preferably betweenthe drive wheels 6 of the locomotive. The two water chambers shown atopposite sides of the locomotive may form part of a continuous waterchamber of rectangular or other suitable shape. The pipes f and 7, whichlead from the left-hand water chamher (1 in Fig. 3 to the uppercontainers 6 and b res ect-ively, are arranged in re ular alternatlon,and in close contact wlth each other at their lower portions, so as toform an unbroken or continuous side wall on that side of the fire box.Similarly, on the other side of the fire box, a continuous wall isformed by the lower portions of the pipes g and 9 arranged alternatelywith each other and leading from the right-hand water chamber at to theupper containers 6 and b respectively. As shown in Fig. 3 (and this isthe preferred arrangement) the pipes f are in the same transverse laneswith the pipes g, and the pipes f wil be in the same transverse pi s g.e lower ends of these pipes or tu es f, 7", g, g, where they areconnected to the water chambers 42, are made of somewhat reduceddiameter, as indicated in Fig. 3. so that the desired close contact maybe obtained between adjacent tubes.

On the outer sides of the tubular fire box walls thus formed, I havearranged on each side of the locomotive a second set of tubes )5. and72. respectively which connect the water chambers 01 directly with thecorresponding lower containers or drums a and a respectively. Since thewalls formed by the tubes 7", f, g, g, shield the tubes it, it, from thedirect heat ofthe combustion gases, the outer tubes It, it, will berelatively cooler lanes with the correspondingand the water will flowtherein downwardly, while in'the tubes 7, f, g, g, the water will travelupwardly.

If the water chambers (Z of the fire box were connected only with therespective containers located on the same side of the locomotive, therewould be two entirely separate paths for the circulation of the water,one on each side of the locomotive. By employing the arrangementdescribed, according to which each of the water chambers (left andright) is connected with contain-- ers on both sides of the locomotive,I obtain a thorough circulation of water through all four containers andthrough the fire box.

For instance, starting from the upper lefthand container 7), there iswater circulation through the following path: upper lefthand container72, water tubes 0, lower lefthand container a, down-take pipes h,lefthand water chamber 03, uptake pipes f; upper right-hand container5', water tubes 0, lower right-hand container a, downtake pipes k,right-hand water chamber 03, uptake pipes 9, upper left-hand container7). In addition thereto, there is, of course, also an individual watercirculation on each side of the boiler, for instance, on the left-handside such circulation takes place through the following path: uppercontainer 6, water tubes 0, lower container a, downtake pipes k, waterchamber d, uptake pipes f, and upper container 6.

In the longitudinal boiler located in front of the fire box, I haverovided casings 2' between the lower containers a, at. These casingsserve to .gather the cinders deposited thereon and to cover or close thegreater part of the free space remaining between these containers, sothat the furnace gases may be properly guided. For this purpose,

the casings i are bent upwardly to a suitable extent at their front andrear ends, as indicated in Figs. 1 and 2. Furthermore, these casings areso constructed and arranged that they may be removed from the boilerforwardly through the smoke box door.

Various modifications may be made without departing from the nature ofmy invention as defined in the appended claims.

I claim:

1. A boiler comprising a fire box, a smoke box, upper left-hand andright-hand and lower left-hand and right-hand steam and water containersextending longitudinally from said fire box to said smoke box, watertubes connecting the said left-hand containers, other water tubesconnecting the said right-hand containers, said fire box having a gratelocated below the level of said lower containers, water chambers locatedat opposite sides of said grate, and water tubes connecting said waterchambers with said containers and forming side walls for said fire box.

and water tubes connecting said-waterc 2. A locomotive boiler comprisinga fire box having a grate located between the drive wheels, a smoke box,upper left-hand and right-hand and lower left-hand and righthand steamand Water containers located above the level of said grate and extendinglongitudinally from said fire box to said smoke box, water tubesconnecting the said left-hand containers, other water tubes con nectingthe said right-hand containers, water chambers located at opposite.sides'of said grate, between the drive wheels, and water tubesconnecting said water chambers with said containers and. forming sidewalls for said fire box.

3. A boiler comprising a fire box, a smoke box, upper left-hand andright-hand and lower left-hand and right-hand steam and water containersextending longitudinally from said fire box to said smoke box. watertubes connecting the said left-hand con tainers, other water tubesconnecting the said right-hand containers, said fire box having a gratelocated below the level of said lower containers, connected waterchambers located at opposite sides of said grate, and water tubesextending upwardly from said water chambers and forming side walls forthe fire box, some of the last mentioned water tubes extending from thewater chambers to containers on the same side of the boiler while othersof said water tubes extend from said water chambers to containers on theopposite side of the boiler, whereby water may circulate through a pathincluding containers and water chambers on both sidesof the boiler.

4. A boiler comprising a fire box, a smoke box, upper left-hand andright-hand and lower left-hand and right-hand steam and watercontainers, extending lon itudinally from said fire box to said smokeox, water tubes connecting the said left-hand containers, other watertubes connecting the said right-hand containers, said fire box having ateach side water chambers located below the level of the lowercontainers, uptake water tubes extending from each "of said waterchambers alternately to the u per container on the same side and to t eupper container on the other side, and downtake water tubes extendingfrom each of the lower containers to the water chamber on the same side.

5. A boiler com rising a fire box, upper left-hand and rig t-hand andlower lefthand and right-hand steam and water containers extendinglongitudinally, from said fire box, water tubes connecting the saidleft-hand containers, other water tubes connecting the said right-handcontainers, said fire box having a grate located below the level of saidlower containers, water chambers located at opposite sides of said ate,

I lire box, water tubes connecting the lid neeaeee here with saidcontainers and forming side walls for said fire box.

6. A boiler comprising a the box, upper left-hand and right-hand andlower lefthand and right-hand steam and water containers extendinglongitudinally from said;

salt left-hand, containers, other water tubes connecting the saidright-hand containers, said fire box having at each side water chamberslocated-below the level of the lower containers, uptake water tubesextending from each of said water chambers alternately to the uppercontainer on the seine side and to the upper container on the otherside, and downtalre water tubes extending from each of the lowercontainers to the water chamber on the same side.

if. A locomotive-boiler comprising a fire box having a grate locatedbetween the drive wheels, upper left-hand and right hand and lowerleft-hand and right-hand steam and water containers extending longitudinally from said tire box and located above the level of said grate,water tubes connecting the said' left-hand containers, other water tubesconnecting the said righthand containers, water chambers located atopposite sides of said grate, between the drive wheels, and water tubesconnecting said water chambers with said containers and forming sidewalls for said fire box.

'8. A boiler comprising a fire box, a smoke box, upper left-hand andright-hand and lower left-hand and right-hand steam and water containersextending longitudinally from said lire box to said smoke box, watertubes connecting the said left-hand containers, other water 1 ubesconnecting the said right-hand containers, said v tire box having agrate located below the level oi said lower connected water chamberslocated at opposite sides of said rratc, and water tubes extendingupwardly from said water chambers and forming side walls for the firebox, some of said last mentioned water tubes extending upwardly fromeach of said water chambers to the lower container on the same side ofthe boiler, while others of said water tubes extend from each waterchamber to the upper container on the same side of the boiler, and stillothers of said water tubes extend from each water chamber to the uppercontainer on the other side of the boiler, whereby a path is ati'ordedfor the circulation of water through all of said containers and waterchambers.

In testimony whereof l have hereunto set my hand.

PETER THOMSEN.

